I'm going to bring us back to the Duck Hunt stage, specifically the idea of camping the tree against characters that don't fight well in the air. Duck hunt should be a counterpick, simply because that its bad for some characters, but good for others, and is legal-stage material. You counter-pick a stage because it's better for you and worse for your opponent. So if you lose a game against, let's say, little mac, and the little mac player doesnt ban duck hunt, but bans other stages that are good for your character, you can CP to duck hunt and use the tree to your advantage. I'm not saying you should camp the tree and not come down, I'm saying you should go to the tree whenever you're in a bad situation against that little mac, just to avoid being combo'd further.
Banning Duck Hunt because people can use the tree against ground-based fighters is like banning Final Destination because Mac does better against people without platforms.
I'm going to remind you all that not all stages have to be Neutral/Starters. The entire purpose of having a CP list is because some stages are better for certain characters. Not to mention that the winner of the last round can ban three CP stages, so for example, if a jiggly lost to a little mac, and the next match is on duck hunt, that's the Mac's fault because he/she didn't ban Duck Hunt.